Instagram had more daily mobile visitors than Twitter in the US during August! Let’s put this into perspective: Twitter has 500 million users. Instagram has 80 million. The average Instagram user, however, spends 257 minutes per month on the app, compared to the average Twitter user’s 170 minutes. The challenge for Facebook is to turn that billion dollar investment of theirs into money, while still allowing the Instagram team to deliver on their promise – that the app will not change its nature. Interesting times ahead, as usual …